Propeller



NOV. 22, 1932. LAUSZAT 1,888,681

PROPELLER Filed April 25, 1951 Patented Nov. 22, 1932 GUSTAV LAUSZAT, F MrLWAUKnE; wisebss PROPELLER Application filed Apri1- 25, p

This invention relates to improvements in propellers. a One of the ob] ects of the-present invention is the provision of a propeller of the double blade type, wherein the blades are arranged .onein advance of the other, with one blade 7 mounted upon the reduced portion. 2 of" a provided with a slightly greater curvature than the other blade to increase the action of the blades on the fluid. I

Another object of the present invention is the provision of a propeller of the double blade type, wherein the outer ends of one set of blades are curved toward the other blades and attached thereto, and the curvature of the individual blades is such as to provide for the use of the blades on any type of fluid, and

the blades are so arranged as to increase the pushing or pulling power of the blades in accordance with the direction in which they are rotating.

A further object of the present invention is the provision ofa propeller comprising two opposed sets of blades, one arranged in advance of the other, with one set of blades having their outer ends connected to the other set,

and wherein the blades are readily adapted for use for propelling airplanes, boats, or for other similar uses.

With the above and other objects in view,

the invention consists in the novel features of construction, the combination and arrange.

ment of parts hereinafter more fully set forth, pointed out in the claims and shown in the accompanying drawing wherein:

Figure 1 is a front elevation of a propeller constructedin accordance with my invention, with parts thereof broken away and illustrated in cross section;

Figure 2Vis a sectional view on the line 22 of Figure 1, with the blades in elev'ation' v F igure 3 is a detailed section on the line 33 of Figure 2; and, Figure '4: is a detailed section on the line '45 4-1 of Figure 2.

In constructing a propeller of this type, it

is to be understood that the pitch of the blades can be varied according to the use of the propeller, and-while the propeller in the present instance is disclosed at acertain angle 1931. J Serial No. 532,960."

be made when the device is. put into practice.

upon a single sleeve 1;" This sleeve r ani be driven shaft and the reduced portion is *provided with a key 4:, whereby. the sleeve 1 can be keyed to the shaft.

In constructing the propeller, it I: .will 1 be apparent that the blades may be 'fojiined im, tegral with'the sleeve 1 or detachably con nected thereto, and in the. present instance,

the sleeve Iisformed atjone end with an annular flange "5, I and the if W {vhf *bladesjgenerally indicated at. 6, are provided with attaching ends 7 adapted tobearranged 1 iorp aj merabet een-ma "itwill be readily apparent than chan in-intimate contact with the flange 5"and bolted or otherwise'fconnected thereto means ofthebolts.8;- v 1 In Figures 3 -an,d 4:, the curvature of the,

bladesjis illustrated and it 'will be note'd that the blades 6 are provided with aslight arouate'curve and at the same time are disposed "at an anglerelativeto the sleevel'l. f The. second set oftndes, generally indicatedat 9 are in the present instance formed'integral ends formed, with a. laterally? disposed porto be directed inwardly toward the shaft 3 'with the sleevel and this'secondset' ofblades V v is preferably spaced a predeterminedfdistance from theblades 6ia ndhave theiroute'r tion l0. directed toward the/blades 16. Y

outer-ends of the laterallyfdisposed portions J- ;10 are provided with' apertured 'ears j :11, 'wherebythe bolts 12 1 or similar: fastening 'members may be used for connecting the laterallydisposed portions ll'ofytheouter ends Q "of the blades 16'. It will be noted that' -by curving the outer ends 50f" the blade'sl9j to ward theblades 6, the fluid'during the rotation of the propeller, will have 1 a} tendency the sameftypeas'theblad'es 6, the'lfluid man a "be carried; {back in a" comparatively larg ',volume, ofiering considerable resistance t9 the atmosphere when {used on-an f aeroplane,

or when used 'in-water forpropellinga boat, J

' [50th sets of r P r ns-di 6 "sleeve, spaced sets] of,

. 1Q curvature of the blades 9 of the second set' of blades, a greaterlvolume'of fluid. will be acted upon, so that when the propeller is used for pulling, such as would be the case if the 'device'was used on an. aeroplane, the two r 15 sets of blades will engage a'grea-teramount ture than the body portions'rof ithe blades.

of the other set, the set of blades having the greatest transverse curvature having their tips curved forwardly toward the tips of the other set, and means detachably connecting the tips'of the two sets of the'blades.

In testimony that I-claim'the foregoing have hereuntoset" my hand at Milwaukee, in

the, county of Milwaukee andState Of Wisv con'sin.-

of fluidandsthus increase the pullinglpower. 5

Hbwexier; the air or fiuid'which is. dire tedl w fle dy fthe'a pl' n 5 i fing 'propulsion; is. concentrated .around. the p s2 shaft j3, thus' olfering less .,resistance .than;if J

propellers were of the same style vj a dape ,8 J i- 8 11 V ,f In lithe presentfinstance, the two sets of rqp uer's aresliown attached to the sleeve 3. 1m twodifi'erent ways. Howeven theblades 6; canalso'befojrmed integral with the sleeve 1 1 inTthe-same' manner-as the blades 9,; or [the blades 9 could also be detachably,connected tos'leev'e 1 the same as the blade 6.

While Ihave shown anddesc'ribed the pre- I it ferred embodiment of my; inventiom-itlwill be "apparent 15mm the foregoing that slight changes maybe (made; in the construction when"puttin g.,the invention into; practice- 3 7. without departing from the spirit ofthe same or the ope of theiappe'nded el i v "OppOS-d'set$ of spaqed P QPBH T blades car- I 45 'riediby saidbearing sleeve, each setv of blades I including radially extending elongated subone set ofblades being provided gwi'th'a greater transverse curvature thanthe' foth'er. sjetQof blades.

2, A, p opellercomprising ia --beareller comprisingabearing sleeve,

arallel, body portions the"body I i fingfsleeve, propellerqblades arranged in l V spaced opp'o'sed' sets andfcarried by the sleeve, V 1 (eachset ofblades including radiallyextend- D inggelongated substantially parallel flbody ortions, the g'body portionsjof one iset'of thanfthe'others'et, the tips of theblades hav- ,ingf th greatest transverse curvature being ,5 curved laterally and forwardly towardthe r f, LEI aides havingagreater transverse curvature j tips o fgthe 'bladeslof the other set, and means for connecting the tip's of the: blades of the r, twqse mg nip- 1 3.: A propeller comprising bearing :nected i0; said bearing sleeve, each set of propeller blades con j blades including radially -fextending--eloii jgatedg substantially -parallel body portions, 7 of one set of 'blales., being reater ra sver e curves 3 1;

V the body 7 portions GUSTAV L uszAT;

' f so A,

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